World number one Jannik Sinner said Friday he did not know when the highest court in sport will deliver its verdict as ATP chairman Andrea Gaudenzi stressed the Italian's doping case was "run by the book".

ATP chairman Andrea Gaudenzi has insisted Jannik Sinner's doping case was "run by the book" with no preferential treatment, and expressed confidence that tennis would survive should the Italian be banned.

"Jannik Sinner should be suspended because every athlete is responsible for what goes into his body," Sorgal began. "In the event of acquittal, the entire anti-doping system would make itself ridiculous in the eyes of the world," he added.